Tutorial: Getting Started with Protege-Frames
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Creating slots
In Protege-Frames, classes can be thought of as concrete concepts from the domain, such as Editor and Columnist. Classes are more than simple objects arranged in a hierarchy. They can also have attributes, such as a name, phone number, or salary, and relations between them, such as the Author of an Article.

Class attributes and relations are described using slots. In the following sections you will learn how to create slots, assign slots to classes, describe relationships between classes using slot, and how slot inheritance works.